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12150 Uppsatser om Science and Technology Studies - Sida 55 av 810
Modelering av Wideband : Code Division Multiple Access
Today wireless transmission of data is becoming more and more popular and the need for faster transmission rates is increasing. Since the bandwidth is limited it is important to try to use it to the fullest. CDMA is a technology that allows multiple accesses on the same frequency and time thus making it very bandwidth efficient. The CDMA technology was first introduced in the second generation?s cellular systems but has since then been improved and is reused in today?s 3G systems as Wideband CDMA.
Automatiskt avvägningssystem för obemannad undervattensfarkost
This master thesis work was done at Saab Underwater Systems AB, a company at the cutting edge of underwater technology. Here torpedoes and other underwater vehicles are developed and manufactured. The major customers are navies of different countries, mostly the Swedish navy. The aim of this master thesis is to develop, construct and evaluate an automatic Trim System for Unmanned Underwater Vehicles. The task of the system is to change the position of the centre of mass and the vehicle?s total mass or volume.
Den trådlösa massan - svärmbeteende och kollektiv handling
This essay seeks to analyze the consequences of modern information and communication technology for collective action within the framework of social movements. With references to the protests in Seattle 1999, the essay argues that the emergence of distributed collective action is closely related to the use of technology, for example cell phones and Internet. This distributed collective action can be characterized by its decentralized and self-organizing features, forming a global pattern emerging from local interactions. Whereas contemporary theories of collective action can be ´stretched´ to fit these aspects, they lack analytical tools to describe and analyze such systems. Further, their rejection of classical crowd theory is problematic, since it contains valuable insights.
Regionaliseringens effekter pa? svensk filmmusik : En kvalitativ studie av nutida filmskapares produktionsma?ssiga fo?rutsa?ttningar
This thesis examines Swedish filmmakers' modes of work and production within the Swedish film landscape. An introductory historical overview treats the Swedish regionalization since the mid 1990's. Political and economical aspects of producing films in various regions serve as a background for understanding the new generation of decentralised Swedish filmmaking, and the use of sound and music in contemporary film. The analysis consists of empirical studies; interviews with directors and producers, working with music for film and TV. Although the filmmaking perspective is in focus, composers and film scholars are heard as well.
EU som global politisk aktör - En utvärdering av Normative power Europe
What kind of international actor is the European Union and how shall we define it? These are questions that many have tried to answer often by addressing the apparent uniqueness of the EU itself. One of these theories is Normative power Europe. A theory whose main argument is that the EU is best perceived as a changer of norms. My aim with this thesis is to test this claim and to see if the Union should be regarded as a normative power.
Wireless Fidelity - A Scenario Analysis
AbstractTitle: Wireless Fidelity ? A Scenario Analysis Authors: Mellberg Ola, Technology Management, Lund UniversityMårtensson Jens, Technology Management, Lund University Tutors: Andersson Jens A, Faculty of Engineering LTHKarlberg Johan, Sony Ericsson Mobile Communication ABSvensson Claes, Lund University Discussion: The most significant impacts on the telecom industry over the past decades have been the rapid growth of the Internet and mobile telephone services. Currently these two worlds are converging. Moreover, the fast expansion of wireless high capacity Internet access, increased distribution of local/public hotspots and rapid development of wireless network cards have opened new opportunities for the mobile telecom industry. Research Questions:To what extent could the explosion of local and public wireless networks, using WiFi technology, affect the future telecom industry? Who will ultimately master the WiFi innovation and to what degree could this innovation open new possibilities for external players to enter the mobile voice industry? Purpose: The purpose of the Master Thesis is to provide Sony Ericsson Mobile Communication AB with the most transformational scenarios, which will enable employees to recognise patterns and interpret the meaning of WiFi-related events as they unfold.
Drogförebyggande arbete riktat mot barn och ungdom : Vad som görs i skola och kommun i två kommuner i Skåne
This paper is about drug prevention. In my paper the aim is to examine when, where and how the drug prevention work, by law, is being realized, on local levels, in school and municipality, towards youth.My central questions are among others: What does it imply, how the municipality and school value the drug prevention work?, Which prevention programs do the municipality and school use? and Does the drug prevention work give any results? The method I've been using is qualitative interviews and studies of literature and research.The main results I gained with my studie are, that the work of politicians is not in phase with the development in society. And in spite of the fact that drug prevention programs are used, the young ones are using drugs and alcohol more than ever..
Experimentell undersökning av provkroppar för trälimfogar
This thesis engages the topic of test methods for wood adhesives. Two test methods were evaluated, EN 302-1, a European standard, and ASTM D905, an American standard. The total amount of specimens manufactured and tested was more than 500. The adhesive bonds were tested in shear with an increasing load on the specimen until failure.The adhesives used were epoxy-resin, phenol-resorcinol-formaldehyde and a 2-K polyurethane. The test programme included five different types of intentional errors per method, in order to investigate the sensitivity of the test methods.
Rening av metallhaltigt avloppsvatten : En teknisk/ekonomisk utvärdering av reningsmetoder för metallhaltigt avloppsvatten
This Master?s Thesis aims to investigate and assess the methods used to decrease the discharge ofmetals, primarily copper, from the water purification plant at Assa Industries plating factory inEskilstuna.Literature studies of the purification methods precipitation, ion exchange, evaporation, reverseosmosis and electrolysis has been done to appraise the adequacy of the technique. Thesetechniques are commonly used for purification of industrial waste water.Assa has four plating lines: the Trumline, the big Zinkline, the new Zinkline and the Decorativeline. The new Zinkline is the most modern of the four lines and purification is done byrecirculation over an ion exchange unit. The demand for fresh water is thereby heavily reduced.The Trumline, the big Zinkline and the Decorative line all use older techniques.
Regionkontor i Bryssel, En studie om regionala mål, medel och samarbeten i den europeiska sfären
The base for the study is laid during an internship at a regional office in Brussels. The study initially concentrates on the function and activities of different regional offices located in Brussels, in order to answer the core question.The main focus is to reveal an eventual change of cooperation patterns between different regional offices, and in particular the eventual redirection away from a main cooperation between offices deriving from the same national state.Through an empirical material, based on a series of interviews, an analysis is made using three hypotheses concerning the patterns of cooperation among regional offices.The notion of a coming change stated by, in particular, two older studies is used as a theoretical steppingstone with the conclusion that a change, in the way offices collaborate, has taken place..
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Att hantera den förändrade vardagen - hälsan som ett ensamprojekt : Studie av kvinnor som drabbats av hjärtinfarkt
Knowledge about womens experiences that after a myocardial infarction try to comply with dietary recommendation is relatively unknown today. Scientific studies have concentrated on men as a patient and the woman as a partner when it comes to myocardial infarction. There is a need for qualitative studies to investigate womens perceived and actual support after a myocardial infarction..
Accessoarer för framtidens kontor
This thesis investigates if a system for small scale electricity production located in anurban environment can be profitable. The work has been divided up into two parts,one extensive literature study and one case study. The purpose of the literature studywas to investigate the area, resulting in a choice of which technology to be studied indepth in a case study.In the case study a system containing small scale wind turbines and photovoltaicsmounted on Gränby Centrums roof was examined. From data containing wind power,wind direction and total irradiation, possible production from a system weresimulated. Three products of each technology were examined in the simulations.From the simulated production an economic analysis was carried out, this toinvestigate if a system is profitable.
Diskriminering, vad betyder det? En kvalitativ intervjustudie om vad ungdomar anser att diskriminering är
Detta är en studie av ungdomars syn på diskriminering. Syftet med vår undersökning är att undersöka vad ungdomar anser att diskriminering är. Tidigare forskning visar att diskrimineringsbegreppet kan vara svårt att definiera och att ungdomar inte har kunskap om begreppets fulla innebörd. Våra kvalitativa intervjuer med sex ungdomar visar att diskrimineringsbegreppet är svårt att definiera och att deras definition av diskriminering stämmer överens med delar av barn- och elevskyddslagen. Med hjälp av teorier om intersektionalitet kan vi se att ungdomarna inte har tillräckliga kunskaper om vad diskriminering är och detta medför att de inte vet sina eller andras rättigheter inför barn- och elevskyddslagen..
Är demokratin i förändring? : En analys av demokratibegreppet i läroböcker i samhällskunskap för åk 4-6
The purpose of this study is to determine whether or not there has been a change in the use of democratic values in textbooks in social science for classes 4-6. The focus lies on democratic values from two different theoretical perspectives, Dahl?s theory of democracy and Habermas deliberative democracy. The method used is a text analysis based on a model made by Lennart Hellspong. The material we?ve analysed consists of four textbooks in social science from different decades, with a range from 1981 until today.